How do you convert 2000 I.U. To m.g?

To convert International Units (I.U.) to milligrams (mg), you need to know the specific substance being measured, as the conversion factor varies. For example, for vitamin D, 1 I.U. is equivalent to 0.025 micrograms, so 2000 I.U. would equal 50 micrograms (0.05 mg). Always check the specific conversion factor for the substance in question.